Marwick's Pianos, Incorporated, purchases pianos from a large manufacturer for an average cost of $1,520 per unit and then sells them to retail customers for an average price of $3,300 each. The company's selling and administrative costs for a typical month are presented below: Costs Selling: Advertising Sales salaries and commissions. Delivery of pianos to customers Utilities Depreciation of sales facilities Administrative: Executive salaries Insurance Clerical Depreciation of office equisment Cost Formula $943 per month $4,774 per month, plus 6% of sales $62 per piano sold $632 per month $5,040 per month $13,592 per month $712 per month $2,459 per month, plus $42 per piano sold $855 per month During August, Marwick's Pianos, Incorporated, sold and delivered 57 planos. Required: 1. Prepare a traditional format income statement for August. 2. Prepare a contribution format income statement for August. Show costs and revenues on both a total and a per unit basis down through contribution margin.